Nitro Nina — Nitroglycerin: Sublingual Rules, Headache & Dangerous Combinations
One tablet under the tongue melts her angina in minutes — one tablet with the wrong pill can drop her pressure to the floor
Nina feels her familiar chest pressure while climbing stairs. She sits on the steps, places one nitroglycerin tablet under her tongue, and feels the expected warm flush and mild headache as the pain melts away.
Nina has stable angina and carries sublingual nitroglycerin everywhere. Nitroglycerin dilates veins and coronary arteries, reducing preload and myocardial oxygen demand so chest pain resolves within minutes. The rules are precise: sit down first, one tablet under the tongue, repeat every 5 minutes up to three doses, and call 911 if pain persists after the first dose. Headache and flushing are expected from vasodilation; the bottle must stay dark, dry and fresh because nitroglycerin degrades. The lethal trap is combining nitrates with PDE-5 inhibitors (sildenafil, tadalafil) — the additive vasodilation can cause fatal hypotension.
Read Nitro Nina's full story →The story arc
The setup
Nina is prescribed sublingual nitroglycerin for angina and taught: sit down, one tablet under the tongue, let it dissolve — do not swallow it.
The turn
After her first tablet, Nina gets a throbbing headache and flushed face and worries the medication is harming her.
The crisis
Nina's husband takes a nitroglycerin tablet for chest pain two days after using sildenafil, and his blood pressure crashes to 70/40.
The save
The nurse teaches Nina the full protocol — sit down before dosing, one tablet every 5 minutes up to three, call 911 if pain continues after the first dose, keep tablets in the dark glass bottle, and always tell providers about nitrate use.
NCLEX study section — Nitroglycerin: Sublingual Rules, Headache & Dangerous Combinations
What this chapter is testing: the recognition cues, the numbers and the priority action.
Study section: Pharmacology
Take this chapter into practice questions on the same topic.